SD Card resize partition

Hey guys!

I've got an 8 GB image using Pi Baker to put it on a 16 GB sd card.
The problem is that only the 8 GB is allocated on the SD card.

Can someone explain how to expand the none used data so I can use the whole SD card?

Why I want to use the 8 GB image file is because of that all SD Cards has different file sizes.
All of them are 16GB but in reality 16,04 GB and another 16,03 GB.
Using Pi Baker with a 16,04 GB image file won't work on a 16,03 GB SD card.
Do you see my problem?

I'm using LibreELEC and I've seen funktions like parted and gparted. Apparently they can not be installed just because LibreELEC is locked.

Please, someone.. help!

Thanks

Quote from lrusak

Just use our SD card creator application to install LibreELEC on your SD card and it will expand to fill the entire SD card on first boot.

Really?
Will this not overwrite all my settings I've done on my image?

Quote from chewitt

Write the 8GB card image to the 16GB card using our SD/USB writer app or any other writer app. Then put the 16GB card in a computer running any standard-ish Linux distro and use gparted to resize the storage partition on the card. Our app can write the image, but it cannot expand it.

The last writer just told me so and I got confused when the USB-SD Creator told me that my SD Card will be overwritten.

So, you mean that I put my SD Card in a USB Memory Reader. I put it into another raspberry pi running Raspbian and install gparted.
Is that correct?

Quote from chewitt

If those are the tools available .. sounds good.

Is this explained how somewhere?
You're dealing with a newbie, I'm afraid!

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